A 9/11 first responder working as a Clarkstown school district security guard claims the district retaliated against him for speaking up about a co-worker's inappropriate sexual advances toward an underage student and cafeteria worker.

After reporting the incidents of sexual misconduct, Carlos Martinez said he wound up being transferred to a different school, his hours were changed and a policy was put in place that made it harder for him to continue medical treatments related to his service at Ground Zero.

The 21-page lawsuit filed Nov. 29 in state Supreme Court lists the school district, Schools Superintendent Martin Cox, Deputy Personnel Superintendent Jeff Sobel, Director of Facilities and Operations Anthony Valenti and Clarkstown North High School Principal Harry Leonardatos as defendants.

The lawsuit does not specify monetary damages.

Cox released a statement Tuesday afternoon in which he said the district had not been served with the lawsuit and doesn't discuss personnel matters or litigation.

"Nevertheless, the district disagrees with the statements in recent news reports and is committed to providing a safe learning and working environment for our students, faculty and staff," he said.

Martinez, who retired from the NYPD in 2010 and has been working in the district for the last seven years, also says officials only suspended the security guard accused of "inappropriately touching" a female cafeteria worker and underage female student.

The two incidents reportedly occurred during the spring of 2014 at Clarkstown North High School, one of the district's two 9-12 schools.

After the guard's 30-day suspension, there was no further discipline nor were the incidents passed onto local authorities, the lawsuit states.

Two days before the start of the 2014-15 school year, Martinez was informed he was being reassigned to Clarkstown North and his hours were being changed.

He accepted the transfer, believing it was because the security guard accused of sexual misconduct had been terminated. However, he soon learned the security guard had been given his former position at Clarkstown South, the lawsuit says.

The district also began requiring Martinez to provide documentation for each appointment for 9/11-related medical treatment and to use sick time for each visit to the doctor.

The new requirement forced Martinez to use up all his sick time and he was told he would be “written up for abusing sick time,” which could result in his termination.

After that, he stopped going to his regularly scheduled appointments and wound up losing his place at the medical facility that had been providing him 9/11-related testing and monitoring for over a decade, the lawsuit states.

Prior to the policy change, Martinez would inform his boss of each appointment and ask to be excused to leave work one or two hours early without pay to avoid using sick time.

Attempts to compromise on the issue of sick time usage were not successful and in spring of 2017 he was written up for abuse of sick time, the lawsuit states.

Martinez, a Hispanic, also believes he is being discriminated against because other "non-Hispanic white individuals" in the district attend various recurrent medical appointments, such as dialysis, but aren't required to use full sick days, the lawsuit states.